Aisle barrier



FIG. 1 is a front view of the aisle barrier.

FIG. 2 is a top view of the aisle barrier, and the bottom view is a mirror image thereof.

FIG. 3 is a side view of the aisle barrier; and,

FIG. 4 is a rear view of the aisle barrier.

The broken lines are shown for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for an aisle barrier, as shown and described. 